Tool for vacuum-cleaners.



L. BRANDT.

TOOL FOR VACUUM CLEANERS.

APPLIOATION FILED B11111221, 1910.

1,035,852. Patented Aug. 2o, 1912.

UIQ( Wil Lewllf ,Brazzd' LEWIS BRANDT, OF PITTSBURGH, PENNSYLViANIA.

TOOL FOR VACUUM-CLEANERS.

insassav Specication of Letters Patent.

Patented Aug. 20, 1912.

Application led September 21, 1910. Serial No. 583,011.

To all whom it may concern -zen of the United States, residing at Pittshurgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Tools ,for Vacuum- Cleaners, of which the following is a specification.

The pneumatic tool of my invention is for use in connection with vacuum cleaning apparatus, and is devised for the purpose of cleaning carpets.

'That there are, however, features of my invention which may be used with other tools, that the tool of my invention may be fused to do other Work, and that the tool I have devised may be given other structural form without departin from the spirit of the-invention; will all e apparent upon an understanding of that invention.

For the best cleaning of carpets a tool should have two prime features in addition bto 'giving of a-good suction. The vadmis,- sion of a goodly-quantity of air in and along the nap of the carpet is one of these features, and the agitation of the nap to loosen the dust in the depth of the nap and body of the carpet is the other. y

The tool of my invention is of the vusual general form comprising a main body havlng a passage way terminating at one end in an opening for a suction conduit, and at the other in a relatively long'narrow opening defined by lips.- Instead of formin these lip surfaces continuous and unbro en, I

. groove them, forming on them channels of reversed inclination Jto the direction of movement of the tool. The action of these Y and allow a channels is to move the nap of the carpet from side to side, and to oscilla-te each fiber of it' back and forth as the tool is moved back and forth over the floor. The flow of air is also'increased by virtue of the presence of the channels which are not entirely lled b the nap of the carpet. Furthermore t e intervening projections between the channels s read the na of the carpet -flow of air trough the passages thus formed between the nap. Preferably I form a plurality of intersecting grooves which define rowsof staggere ointed projections on the mouth, the projections of successive rows being staggered with res ect to those of the adjacent row. Preferably also I extend the grooves forming the zigzag channels from the outside of In the drawings I have shown two forms of my lnvention.

Figure 1 is an elevation of the tool of one form, Fig. 2 is bottom face View of the mouth of the same, and Fig. 3 is a similar vlew of a portion of the tool of the other form, and Fig. 4 is a perspective view showing a portion of the under-surface of the tool on an enlarged scale. Fig. 5 is a cross sectional view of the tool on an enlarged .-inlet encl-` of the tool` According to my invention I form in the -lips .of the tool intersecting V-shaped grooves 15 and 16, the grooves 15 bein-g inthe mouth to the inside or clear across each Beit known that I, LEWIS BRANDT, a c1t1- clined to the length of the mouth of the tool in one direction, while the grooves 16 are inclined `an equal angular distance in the -other direction. The sides of these grooves,

and the 4lateral distance between them is made such as to form on the lips several I rows of intervening pointed or lozenge and semi-lozen shaped projections 17, the projections o each row being staggered with respect to those of the adjacent row or rows. An examination of this grooving will reveal the fact that the said grooves 15 and 16 together form a plurality of adjacent zigzag or reversely inclined grooves 18,' the zigza path of several of these grooves being in icated by dotted lines and designated 18, Fi 2. It is evident that channeling the un er or contact surface of the tool provides means for the passage of air thereunder into the mouth 13 when the tool is being used,

and further, 'that the interveningV projections between the grooves will divide the na of the carpet into small tufts and these tu s, as the tool -is moved, follows the direction of the channels, the tufts being bent to-one side by said channels until the intersection or turns therein are reached and then being temporarily relieved of ressure they are bent the other way. Iii other words, the nap is divided by the projections and following the channels 18, `-1s bentfirst to one side and then to the other, thus open ing up the carpet so that. the air iiowing 'through said channels and the assages thus created in the nap reach the bo y of the car? petand clean it thoroughly. The movement of the tool dividin the nap and oscillating each fiber froms e to side enables the air' to reach ever part of the carpet. In this embodiment have shown such a spacing of the grooves that three rows of intervening projections 17 are formed on each lip. rllhe tufts of the nap are thus divided and re-divided, and lthis together with 'a moderate backward and forward movement of the tool insures a most minute division and re-' In the modification of Fig. 3, the cham' nels 18" are made sinuous, instead of being formed by intersectingstraight. grooves. lt

is to be noted that the action is substantially similar, the reverse inclination of the channels to the direction of movement of the tool accomplishing the movement of the nap back and forth. Vanes 19 across the mouth vfrom lip to lip 'at an angle and flush with the mouth further agit-ate the nap in the midst ofv the area being cleaned. These vanes pref# erably extend from the inner end f of one sinuous projection 17 to the .inner end of one on the opposite lip and are spaced to proi vide one for every other projection as shown.

This increases the freedom of movement of the nap within the mouth.

1. A pneumatic cleaning tool having on its mouth intersecting grooves forming zigzag channels of reversed inclination to the normal direction of movement of the tool.

2. A pneumatic cleaning tool having zigzag channels on its mouth vformed by lnterseating straight grooves,` said grooves delin-v ing projections on the lips of the tool with forwardly and rearwardly pointed ends to.

engage t e nap of a carpet and vibrate the fibers thereof.

In testimony whereof l have hereunto set my hand in presencel of two subscribing witnesses. Y

. LEWS BRANDT.

l/Vitnessesz A Amon A. 'llrzmn9 DARWIN MCC. 'lAvLonL 

